End tank for heat-exchange units



April 1931. E. H SEELERT END TANK FQR HEAT EXCHANGE UNITS Filed Dec. 16,1929 2 Sheets-Sheet 1 ZSheets-Sheet 2 ill 4. 9

April 28, 1931. E. H. SEELERT END TANK FOR HEAT EXCHANGE UNITS Fild Dec.16, 1922 j zwwgfreezepz J52 29M WM q (QM? J wwL 1.1 .l

Patented Apr. 28, 1931 UNITED STATES PATENT, OFFICE EDWARD H. SEELERT, FMINNEAPOLIS, MINNESOTA, ASSIGNOR T0 MCQUAY RADI- ATOB CORPORATION, OFMINNEAPOLIS, MINNESOTA, A CORPORATION OF DELAWARE END TANK FORHEAT-EXCHANGE UNITS Application filed December 16, 1929. Serial No.414,895.

My present invention relates to a heat exchange unit and has for its-primary ob ect the provision of an extremely simple and highlyefficient end tank for a radiator core having horizontal tubes.

Generally stated, the invention consists of the novel devices andcombinations of devices hereinafter described and defined in the claims.

1 In the accompanying drawings, which illustrate the invention, likecharacters indicate like parts throughout the several views.

Referring to the drawings:

Fig. 1 is a view partly in front elevation and artly in longitudinalvertical section of a eat exchange unit in which the invention isembodied;

Fig. 2 is a perspective view of one of the end tanks;

Fig. 3 is a view principally in horizontal section taken on the line 33of Fig. 1, on an enlarged scale;

Fig. 4 is a transverse vertical section taken on the line 4-4 of Fig. 3;and as Fig. 5 is a longitudinal vertical section taken on the line 5-5of Fig. 4. V The heat exchange unit illustrated comprises a pair ofspaced cast metal end tanks 6 having open backs and a radiator coretherebetween. Said radiator core comprises vertically and horizontallyspaced horizontal flat tubes 7, headers 8 on the ends of said tubes andfins 9 on the tubes 7 between said headers. The tubes 7 havecommunication :5 with the end tanks 6 and said headers close the openbacks of the tanks 6 and are secured thereto by steam and water tightjoints. This heat exchange unit further includes a pair of side plates9' for the radiator core and which plates are rigidly secured at theirends to the end tanks 6, as indicated at 6 and have on theirlongitudinal edges inturned flanges 9' ers 8 and fins 9. x In the bottomof each end tank 6 is a which overlie the headsump 10 into which all ofthe tubes 7 drain and in the face of said tank is a 'bossed opening 11through which said sump drains. The openings 11 are tapped and shorthorizontal pipes 12 are secured therein. Couplings 13, one of which is avalve casing, connect the pipes 12 to the upper ends of vertical intakeand return pipes 14 and 15, respectively.

sheet metal cabinet for the radiator core is indicated as an entirety bythe numeral 16 and may be supported in any suitable manner. I m

The connections for the radiator core, as illustrated, are for a hotwater heating system and for certain other heating systems such as steamwherein only one pipe will be used, and in which case the opening 11, inone of the end tanks 11, will be plugged. All of the tubes 11 drain intothe sumps 10 and when only one pipe leads to the radiator core, saidcore will be supported so that its tubes drain into the sump 10 in theend tank to which the supply pipe leads.

As shown, the radiator is supported entirely from the pipes 14 and 15and when legs are used for supporting a radiator core they will besecured in apertured ears -17 integrally formed with the end tanks 6,see Fi s. 2 and 3.

baflie 18 is mounted in the intake end tank 6 and is in the form of anapertured plate secured within said tank just forward of the respectiveheader 9 extends the full height of said tank and is ll-shaped inhorizontal section. The purpose 0 this bafiie 18 is to more evenlydistribute the heating medium from the intake end tank 6 to the severalvertically and horizontally spaced rows of tubes 7 and thereby increasethe efiiciency of the radiator core.

As is well-known, each section of a standard cast iron radiator has alength, in reference to the radiator, of two and one-half inches and inmy present invention each I end tank 7 has a corresponding length andeach end tank.

the tubes between the two end tanks have a length that is a multiple ofthe length of By thus standardizing my radiator core and end tanks, thesame may be readily substituted for a cast iron radiator, mounted in thesame space occupied thereby and without changing the intake or outletpipes.

By providing the end tanks 6 with sumps 10 the radiator core may bemounted in a true horizontal position and hence not necessary to inclinethe same for the purpose of drainage.

Lines Y indicate the sections of an ordinary cast iron radiator.

Without the use of the bafile 18 in the intake end of a steam radiatorthe steam, when first turned on, will-rush into the core of the radiatorwith considerable velocity and fill the center tubes, which are directlyopposite the steam inlet, before entering the rest of the tubes. Undersuch a condition the heat of the steam will cause the center tubes toexpand first thereby, setting up mechanical strains between the tubesand headers. The object of this bafiie 18 is to break up such a rush ofsteam and evenly distribute it throughout the core so that all of thetubes receive steam at ap roximately the same time, resulting in unifdrm expansion of the core without subjecting it to mechanical strains.Said baffle also prevents a sudden rush of steam into the radiator whichwould carry any accumulation of water due to condensation through a fewof the tubes at a high rate of speed causing a gurgling noise in thecore.

What I. claim is:

1. A heat exchange unit comprising an end tank, a radiator core havinghorizontal tubes in communication with the end tank,

said tank having a sump into which the tubes drain and a horizontaloutlet opening through which the sump drains, and a bafiie in the endtank' arranged to drain into the sump.

- 2. A heat exchange unit comprising two spaced end tanks, a radiatorcore between the end tanks and having horizontal tubes in communicationtherewith, each end tank having a sump into which the tubes drain, and ahorizontal outlet opening through which the sump drains, and a baflle inthe receiving end tank arranged to drain into the respective sump.

3. A heat exchange unit comprising an end'tank having an intake opening,a radiator core having a row of tubes in communication with the endtank, and a bafiie in the end tank between the intake opening and tubes,said bafile being in the form of an apertured plate that is V-shaped inthe plane ofsaid row of tubes with its apex toward the intake openingand forms a transverse partition in the end tank.

4. A heatexchange unit comprising an end tank having an intake opening,a radiator core having horizontally and vertically spaced horizontaltubes in communication with the end tank, and a bafiie in the end tankbetween the intake opening and tubes, said battle being in the form ofan apertured plate that is V-shaped in horizontal section andkforms atransverse partition in the end tan In testimony whereof I afiix mysignature.

EDWARD H. SEELERT.

